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(No Modem IC. C. & S. B. PARKER. Spring-Scale.

No. 227,645. Patented May 18, 188Q.

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WTI'IESEEE N. PETERS. rHDTo-UTHQGRAPHER, WASHINGTON D L.

UNITED STATES PATENT OEEIcE.

CHAUNOEY C. PARKER AND SIMON B. PARKER, OF BROOKLYN, NEW YORK.

SPRING-SCALE.

SPECIFICATION forming part of Letters Patent No. 227,645, dated May 18, 1880.

Application filed April 7, 1880.

To all whom it may concern:

Vcertain new and useful Improvements in Spring-Scales; and we do hereby declare that thet'ollowing is a full,clear, and exact description ot' the same, reference being had to the annexed drawings, making a part ot' this speciiieation, and to the letters and ligures ot' reference marked thereon.

Figure l of' the drawings is a front elevation of the scales with the pivoted bail in a closed position, and Fig. 2 is an elevation of the same with the cylindrical casing in section and the bail open for use.

This invention has relation to certain new and useful improvements in spring scales or balances, whereby annore durable article is obtained, more compact and less expensive in its construction, as well as possessing means whereby the weight oi" an object is determined after being removed from the scales, as will be hereinafter described, and subsequent-ly pointed out in the claims.

ln the accompanyin drawings, A represents the cylindrical casingt'or containing the spiral spring et and bar b, the latter having graduations upon its face. The casing A is com posed of a continuous coil of wire, the coils of which are compressed together and secured by solder. This I'orms not only a very neat appearance for the casing, but admits otit being manufactured at a greatly reduced cost over the casin gs constructed ot' sheet metal.

A very important advantage in the coiledwire casing is the strength it possesses, it being almost injipossible to dent or otherwise injure it by careless handling.

To the ends ofthe spiral or coiled wire casing A are secured, by solder or other means, caps c d, the lower cap,d, having' secured to it a hook, c, to which the object to be weighed is suspended.

The index-bar b, around which the coiled or spiral spring d passes, is slit at its lower end and bent outward in opposite directions to form a bearing for the lower end ot' the spring, the opposite or upper end of the same being suitably connected to the cap c to prevent said spring from turning.

The index-bar b passes through an opening (No mo del.)

in the cap o, and has pivoted to it a met-al bail, B, of the required width and length, so that it will close down and around the casing A, as shown in Fig. 1, when the scales are not in use.

rlhe bail B has a niche, j', to form a seat for the end of the hook e to protectit.

In closing the bail it is irst turned down over the casin g A and pressed up a sufiicient distance to admit the free end thereot passing under the point of the hook c, after which the spiral spring a retains it in position against the point to protect the hook from injury.

The casing A has secured to it guide-plate g to receive a slide, lz., having upon its upper end a pointer, i, said slide being graduated and numbered to correspond with the graduations and numbers on the barb. rllhis slide lz., with its pointer t, we term an indicator.77

The weight ot the pail or other vessel being indicated by moving the slide to the upper niark on the bar Z1, after which the articles to be weighed are placed in the vessel, the ditterence in the gradnations on the bar and slide would be the weight ot' the articles.

lt' desired, the weight of the articles may be obtained from the gradnations on the indicator alone, as found desirable.

Having now fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. A spring-scale having its outer casing formed from a continuous coil of wire, the coils being compressed together and secured by soldering, substantially as and for the purpose set forth.

2. The casing A, index-bar b, and spring c, in combination with the indicator consisting ot' the slide It and pointer i', substantially as and for the purpose specified.

A spring-scale consisting of the casing A, bar D, spring a, and the slide 7L, with pointer i, said bar b having pivoted to it the bail B, substantially as and for the purpose described.

In testimony that we claim the above we have hereunto subscribed our names in the presence of two witnesses.

OHAUNCEY O. PARKER. SIMON B. PARKER.

Vitnesses:

J. B. DAVENPORT, L. O. JENKINs. 

